677666593 has 4 divisors (see below), whose sum is σ = 678048448. Its totient is φ = 677284740.

The previous prime is 677666567. The next prime is 677666599. The reversal of 677666593 is 395666776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677666593 is a prime.

It is a super-2 number, since 2×677666593² = 918464022536455298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677666599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188253 + ... + 191818.

It is an arithmetic number, because the mean of its divisors is an integer number (169512112).

Almost surely, 2^677666593 is an apocalyptic number.

It is an amenable number.

677666593 is a deficient number, since it is larger than the sum of its proper divisors (381855).

677666593 is a wasteful number, since it uses less digits than its factorization.

677666593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381854.

The product of its digits is 8573040, while the sum is 55.

The square root of 677666593 is about 26032.0301359690. The cubic root of 677666593 is about 878.3589392594.

The spelling of 677666593 in words is "six hundred seventy-seven million, six hundred sixty-six thousand, five hundred ninety-three".